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arXiv 1606.08375quant-ph
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二维分布式相位参考量子密钥分发协议

Two-dimensional distributed-phase-reference protocol for quantum key distribution

Davide Bacco, Jesper Bjerge Christensen, Mario A. Usuga Castaneda, Yunhong Ding, Søren Forchhammer, Karsten Rottwitt, Leif Katsuo Oxenløwe

摘要:

量子密钥分发(QKD)和量子通信使得远程各方之间能够安全地交换信息。目前,基于弱相干脉冲的分布式相位参考(DPR)协议是远程QKD最实用的解决方案之一。在过去的10年中,长距离基于光纤的DPR系统已经成功地得到了验证,尽管诸如固有信道损耗之类的基本障碍限制了它们的性能。在这里,我们介绍了第一个二维DPR-QKD协议,其中信息被编码在弱相干脉冲的时间和相位。每个检测事件提取两个比特信息的能力使得在特定的现实网络场景中能够实现更高的密钥速率。此外,尽管使用了更多的维度,所提出的协议仍然简单,实用,完全可集成。

英文摘要:

Quantum key distribution (QKD) and quantum communication enable the secure exchange of information between remote parties. Currently, the distributed-phase-reference (DPR) protocols, which are based on weak coherent pulses, are among the most practical solutions for long-range QKD. During the last 10 years, long-distance fiber-based DPR systems have been successfully demonstrated, although fundamental obstacles such as intrinsic channel losses limit their performance. Here, we introduce the first two-dimensional DPR-QKD protocol in which information is encoded in the time and phase of weak coherent pulses. The ability of extracting two bits of information per detection event, enables a higher secret key rate in specific realistic network scenarios. Moreover, despite the use of more dimensions, the proposed protocol remains simple, practical, and fully integrable.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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